Route reliability record
ORD→EWR
Chicago to Newark
- Flights
- 5,992
- Period
- June 2025 to May 2026
- Distance
- 719 mi
- Carriers
- 5
This route sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.4%. The late ones land an hour and a half behind schedule. That rests on 5,992 flights, of which Envoy Air flew 721 at 80.0% on time.
Envoy Air is the most reliable of the three carriers covered here at 80.0% on time across 721 flights.
Key figures
On time
69.3%
Arrivals under 15 minutes late, of 5,793 completed flights
Avg delay
85 min
Across delayed arrivals only, not all flights
Cancelled
3.15%
National rate is 1.80%
Best carrier
Envoy
80.0% on time across 721 flights
These figures cover 5,992 flights between June 2025 and May 2026. Beyond the headline rate, 14.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on ORD to EWR
The choice of carrier is not cosmetic here. Envoy Air arrives on time 80.0% of the time; American Airlines manages 53.3%. Sample sizes sit next to every figure, because a two-point gap across 643 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 721 | 80.0% | 61 min | 4.72% | B− |
| United Airlines | 4,335 | 70.9% | 88 min | 2.19% | C |
| Republic Airwaysthin sample | 106 | 61.9% | 83 min | 7.55% | D− |
| American Airlines | 643 | 53.3% | 84 min | 4.35% | F− |
| Spirit Airlinesthin sample | 187 | 45.3% | 77 min | 12.83% | F− |
Envoy Air cancels 4.7% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 38 points, against 27 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,003 flights91.2%
- 8am–11am1,061 flights77.6%
- 11am–2pm978 flights70.1%
- 2pm–5pm1,204 flights62.4%
- 5pm–8pm1,154 flights53.7%
- 8pm–5am592 flights58.9%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 53.7% on time, against 91.2% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in.
Across the year
When delays peak on this route
This route's year swings by 27 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
July is the worst month at 54.1% on time, 27 points below May, the best at 81.5%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck.
Across the week, Tuesday is the strongest day at 74.7% on time and Sunday the weakest at 65.3%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 151,000 reported delay minutes.
- 39%National Airspace System
- 34%Late-arriving aircraft
- 19%Carrier
- 8%Extreme weather
- 0%Security
39% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 59,000 minutes out of 151,000, against a national NAS share of 21%.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.2% on time here.
Cancellations run at 3.15%, against 1.80% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.4% of arrivals land a full hour or more behind schedule, against 8.2% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 719 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg runs 71.4% on time across 5,984 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 5,992 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking this route
Put together: the delay figures matter less here than the 3.15% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic.
Common questions
ORD to EWR questions
How often is ORD to EWR delayed?
Roughly one flight in three arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 30.7% of the 5,992 flights in this analysis, against 22.6% nationally. Delayed flights are late by an hour and a half on average.
Which airline is most reliable on ORD to EWR?
Envoy Air leads at 80.0% on time across 721 flights. American Airlines is at the other end on 53.3%, a gap of 27 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on ORD to EWR?
The 5am–8am departure window is the strongest at 91.2% on time. The 5pm–8pm window is the weakest at 53.7%, 38 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on ORD to EWR?
July is the weakest month at 54.1% on time, compared with 81.5% in May. Across the year that is 27 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- EWR to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Newark Liberty International (EWR) delay statistics
- Envoy Air on-time record80.0%
- United Airlines on-time record70.9%
- Republic Airways on-time record61.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. ORD to EWR and EWR to ORD are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.